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Enclosure 15 - APR1400-Z-J-NR-14013-NP, Rev. 2, Response Time Analysis of Safety I&C System
	ML18087A110
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Site:	05200046
Issue date:	01/31/2018
From:	; Korea Hydro & Nuclear Power Co, Ltd
To:	; Office of New Reactors
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	MKD/NW-18-0039L APR1400-Z-J-NR-14013-NP, Rev. 2
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Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 Response Time Analysis of Safety I&C System Revision 2 Non-Proprietary JANUARY 2018 Copyright 2018 Korea Electric Power Corporation &

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 REVISION HISTORY Revision Date Page Description November 0 All First Issue 2014 4 Editorial Change : Insertion of acronym (3.2.2)

February 98 Incorporation of contemporary revision number of 1 2017 (8) the TeR A2 Editorial Change : Insertion of acronym (A.3.2) 98~103 Addition of Section 7.21 for signal path of ESF-(7.21) CCS. (RAI 300-8297, Question 07.03-4, Rev.1)

January 2

2018 104 Incorporation of changed title of the TeR (8) (RAI 301-8280, Question 07.01-52, Rev.2)

This document was prepared for the design certification application to the U.S. Nuclear Regulatory Commission and contains technological information that constitutes intellectual property of Korea Hydro & Nuclear Power Co., Ltd..

Copying, using, or distributing the information in this document in whole or in part is permitted only to the U.S.

Nuclear Regulatory Commission and its contractors for the purpose of reviewing design certification application materials. Other uses are strictly prohibited without the written permission of Korea Electric Power Corporation and Korea Hydro & Nuclear Power Co., Ltd.

KEPCO & KHNP ii

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 U ABSTRACT This technical report provides the response time analysis of safety instrumentation and control (I&C) system which is intended to be used for Nuclear Regulatory Commission (NRC) Design Certification application of the APR1400.

The safety function of safety I&C system regarding response time analysis is divided into reactor trip (RT) function and engineered safety features (ESF) actuation function. The response time of RT function is defined as the time interval from when the monitored parameter exceeds the trip setpoint value at the input to the sensor until electrical power is interrupted to the control element assembly (CEA) drive mechanism. The response time of ESF actuation function is defined as the time interval from when the monitored parameter exceeds the trip setpoint value at the input to the sensor until the final component such as pump, valve, damper or fan actuates. This report demonstrates that the total response time allocated to the individual components of the safety I&C system such as sensor, signal processing module, digital computer, actuation device does not exceed the corresponding RT or ESF response time requirement assumed in the safety analysis.

This document also demonstrates in Appendix A that the APR1400 safety I&C system conforms to NUREG-0800 Branch Technical Position (BTP) 7-21.

KEPCO & KHNP iii

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TABLE OF CONTENTS 1 INTRODUCTION .................................................................................................. 1 1.1 Purpose .......................................................................................................................................... 1 1.2 Scope.............................................................................................................................................. 1 2 CODES AND STANDARD ..................................................................................... 2 3 SAFETY I&C SYSTEM DESCRIPTION ................................................................. 3 3.1 Safety Functions ............................................................................................................................. 3 3.2 Assumptions ................................................................................................................................... 4 4 RESPONSE TIME REQUIREMENTS ..................................................................... 5 4.1 Response Time Requirements for RT Functions ........................................................................... 5 4.2 Response Time Requirements for ESF Actuation Functions ......................................................... 6 5 SIGNAL PATHS ................................................................................................... 8 5.1 Response time of the RT system ................................................................................................... 8 5.2 Response time of the ESF actuation system ................................................................................. 9 6 RESPONSE TIME ALLOCATION ........................................................................ 10 6.1 LPP for Reactor Trip ..................................................................................................................... 10 6.2 HPP for Reactor Trip .................................................................................................................... 10 6.3 LSGL for Reactor Trip .................................................................................................................. 10 6.4 HSGL for Reactor Trip .................................................................................................................. 11 6.5 LSGP for Reactor Trip .................................................................................................................. 11 6.6 HCP for Reactor Trip .................................................................................................................... 11 6.7 LRCF for Reactor Trip .................................................................................................................. 11 6.8 HVOPT for Reactor Trip ............................................................................................................... 12 6.9 HLPL for Reactor Trip................................................................................................................... 12 6.10 HLPD FOR REACTOR TRIP........................................................................................................ 12 6.10.1 ENFMS Detectors ......................................................................................................................... 12 6.10.2 CEA Positions ............................................................................................................................... 13 6.10.3 CEAC Penalty Factor ................................................................................................................... 13 6.11 LDNBR for Reactor Trip ............................................................................................................... 13 6.11.1 ENFMS Detectors ......................................................................................................................... 13 6.11.2 CEA Positions ............................................................................................................................... 14 6.11.3 Cold Leg Temperature.................................................................................................................. 14 6.11.4 Hot Leg Temperature ................................................................................................................... 14 6.11.5 Primary Coolant Pump Shaft Speed ............................................................................................ 14 KEPCO & KHNP iv

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 6.11.6 Reactor Coolant Pressure from Pressurizer ................................................................................. 15 6.11.7 CEAC Penalty Factor ................................................................................................................... 15 6.12 LPP for ESF Actuation.................................................................................................................. 15 6.12.1 Safety Injection ............................................................................................................................. 15 6.12.2 Containment Isolation ................................................................................................................... 16 6.13 HCP for ESF Actuation ................................................................................................................. 16 6.13.1 Safety Injection ............................................................................................................................. 16 6.13.2 Containment Isolation ................................................................................................................... 17 6.13.3 Main Steam Isolation .................................................................................................................... 17 6.14 HHCP for ESF Actuation .............................................................................................................. 18 6.14.1 Containment Spray Pump ............................................................................................................ 18 6.14.2 Containment Isolation Valves Closed on CSAS ........................................................................... 18 6.15 LSGP FOR ESF ACTUATION...................................................................................................... 18 6.15.1 Main Steam Isolation .................................................................................................................... 18 6.16 LSGL FOR ESF ACTUATION ...................................................................................................... 19 6.16.1 Auxiliary Feedwater Pump (motor driven) .................................................................................... 19 6.16.2 Auxiliary Feedwater Pump (turbine driven) .................................................................................. 19 6.17 HSGL for ESF Actuation............................................................................................................... 20 6.17.1 Main Steam Isolation .................................................................................................................... 20 6.18 CREVAS ....................................................................................................................................... 20 6.19 FHEVAS ....................................................................................................................................... 21 6.19.1 Spent Fuel Pool Area Radiation - High........................................................................................ 21 6.20 CPIAS ........................................................................................................................................... 21 6.20.1 Containment Upper Operating Area / Operating Area Radiation - High ..................................... 21 7 RESPONSE TIME ANALYSIS ............................................................................. 22 7.1 LPP for Reactor Trip ..................................................................................................................... 22 7.2 HPP for Reactor Trip .................................................................................................................... 23 7.3 LSGL for Reactor Trip .................................................................................................................. 24 7.4 HSGL for Reactor Trip .................................................................................................................. 26 7.5 LSGP FOR REACTOR TRIP........................................................................................................ 27 7.6 HCP for Reactor Trip .................................................................................................................... 28 7.7 LRCF for Reactor Trip .................................................................................................................. 29 7.8 HVOPT for Reactor Trip ............................................................................................................... 31 7.9 HLPL for Reactor Trip................................................................................................................... 32 7.10 HLPD FOR REACTOR TRIP........................................................................................................ 33 7.10.1 ENFMS Detector .......................................................................................................................... 33 KEPCO & KHNP v

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.10.2 CEA Positions ............................................................................................................................... 36 7.10.3 CEAC Penalty Factor ................................................................................................................... 38 7.11 LDNBR FOR REACTOR TRIP ..................................................................................................... 40 7.11.1 ENFMS Detectors ......................................................................................................................... 40 7.11.2 CEA Positions ............................................................................................................................... 42 7.11.3 Cold Leg Temperature.................................................................................................................. 45 7.11.4 Hot Leg Temperature ................................................................................................................... 46 7.11.5 Primary Coolant Pump Shaft Speed ............................................................................................ 48 7.11.6 Reactor Coolant Pressure from Pressurizer ................................................................................. 50 7.11.7 CEAC Penalty Factor ................................................................................................................... 52 7.12 LPP FOR ESF ACTUATION ........................................................................................................ 54 7.12.1 Safety Injection ............................................................................................................................. 55 7.12.2 Containment Isolation ................................................................................................................... 57 7.13 HCP for ESF Actuation ................................................................................................................. 61 7.13.1 Safety Injection ............................................................................................................................. 61 7.13.2 Containment Isolation ................................................................................................................... 64 7.13.3 Main Steam Isolation .................................................................................................................... 68 7.14 HHCP for ESF Actuation .............................................................................................................. 71 7.14.1 Containment spray pump ............................................................................................................. 71 7.14.2 Containment isolation valves closed on CSAS ............................................................................ 75 7.15 LSGP for ESF Actuation ............................................................................................................... 77 7.15.1 Main Steam Isolation .................................................................................................................... 77 7.16 LSGL FOR ESF-ACTUATION ...................................................................................................... 81 7.16.1 Auxiliary Feedwater Pump (motor driven) .................................................................................... 81 7.16.2 Auxiliary Feedwater Pump (turbine driven) .................................................................................. 84 7.17 HSGL FOR ESF-ACTUATION ..................................................................................................... 85 7.17.1 Main Steam Isolation .................................................................................................................... 86 7.18 CREVAS ....................................................................................................................................... 89 7.18.1 Control room air intake radiation - High ....................................................................................... 89 7.19 FHEVAS ....................................................................................................................................... 93 7.19.1 Spent fuel pool area radiation - High ........................................................................................... 93 7.20 CPIAS ........................................................................................................................................... 96 7.20.1 Containment upper operating area / operating area radiation - High .......................................... 96 7.21 SIGNAL PATH OF THE ESF-CCS ............................................................................................... 98 7.21.1 Signal Path Case 1 ....................................................................................................................... 99 7.21.2 Signal Path Case 2 ..................................................................................................................... 100 KEPCO & KHNP vi

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.21.3 Signal Path Case 3 ..................................................................................................................... 100 7.21.4 Signal Path Case 4 ..................................................................................................................... 101 7.21.5 Signal Path Case 5 ..................................................................................................................... 101 7.21.6 Signal Path Case 6 ..................................................................................................................... 102 7.21.7 Signal Path Case 7 ..................................................................................................................... 102 7.21.8 Signal Path Case 8 ..................................................................................................................... 102 8 REFERENCES .................................................................................................. 104 9 DEFINITIONS .................................................................................................. 105 APPENDIX A CONFORMANCE TO BTP 7-21 ................................................................ A1 KEPCO & KHNP vii

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 LIST OF TABLES Table 4.1-1 Response Times for RT Functions ............................................................................................ 5 Table 4.2-1 Response Times for ESF Actuation Functions .......................................................................... 6 Table 5.1-1 Signal Path for RT Functions ..................................................................................................... 8 Table 5.2-1 Signal Path for ESF Actuation Functions .................................................................................. 9 Table 6.1-1 Response Time Allocation for LPP .......................................................................................... 10 Table 6.2-1 Response Time Allocation for HPP ......................................................................................... 10 Table 6.3-1 Response Time Allocation for LSGL ....................................................................................... 10 Table 6.4-1 Response Time Allocation for HSGL ....................................................................................... 11 Table 6.5-1 Response Time Allocation for LSGP ....................................................................................... 11 Table 6.6-1 Response Time Allocation for HCP ......................................................................................... 11 Table 6.7-1 Response Time Allocation for LRCF ....................................................................................... 11 Table 6.8-1 Response Time Allocation for HVOPT .................................................................................... 12 Table 6.9-1 Response Time Allocation for HLPL ........................................................................................ 12 Table 6.10-1 Response Time Allocation for ENFMS Detector (HLPD) ...................................................... 12 Table 6.10-2 Response Time Allocation for CEA Positions (HLPD)........................................................... 13 Table 6.10-3 Response Time Allocation for CEAC Penalty Factor (HLPD) ............................................... 13 Table 6.11-1 Response Time Allocation for ENFMS Detector (LDNBR) .................................................... 13 Table 6.11-2 Response Time Allocation for CEA Positions (LDNBR) ........................................................ 14 Table 6.11-3 Response Time Allocation for Cold Leg Temperature (LDNBR) ........................................... 14 Table 6.11-4 Response Time Allocation for Hot Leg Temperature (LDNBR) ............................................. 14 Table 6.11-5 Response Time Allocation for Primary Coolant Pump Shaft Speed (LDNBR) ...................... 14 Table 6.11-6 Response Time Allocation for Reactor Coolant Pressure (LDNBR) ..................................... 15 Table 6.11-7 Response Time Allocation for CEAC Penalty Factor (LDNBR) ............................................. 15 Table 6.12-1 Response Time Allocation for LPP for ESF actuation - Safety Injection Actuation Signal (SIAS) .................................................................................................................................... 15 Table 6.12-2 Response Time Allocation for LPP for ESF actuation - CIAS actuated low volume purge valves ..................................................................................................................................... 16 Table 6.12-3 Response Time Allocation for LPP for ESF actuation - Other CIAS actuated valves .......... 16 Table 6.13-1 Response Time Allocation for HCP for ESF actuation - SIAS ............................................... 16 Table 6.13-2 Response Time Allocation for HCP for ESF actuation - CIAS actuated low volume purge valves ..................................................................................................................................... 17 Table 6.13-3 Response Time Allocation for HCP for ESF actuation - CIAS actuated low volume purge valves ..................................................................................................................................... 17 Table 6.13-4 Response Time Allocation for HCP for ESF actuation - MSIS actuated MSIVs ................... 17 Table 6.13-5 Response Time Allocation for HCP for ESF actuation - MSIS actuated MFIVs ................... 17 Table 6.14-1 Response Time Allocation for HHCP for ESF actuation - Containment Spray Pump .......... 18 KEPCO & KHNP viii

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 Table 6.14-2 Response Time Allocation for HHCP for ESF actuation - Containment Isolation Valves Closed on CSAS .................................................................................................................... 18 Table 6.15-1 Response Time Allocation for LSGP for ESF actuation - MSIS actuated MSIVs ................. 18 Table 6.15-2 Response Time Allocation for LSGP for ESF actuation - MSIS actuated MFIVs ................. 19 Table 6.16-1 Response Time Allocation for LSGL for ESF actuation - Auxiliary Feedwater Pump (motor driven) .................................................................................................................................... 19 Table 6.16-2 Response Time Allocation for LSGL for ESF actuation - Auxiliary Feedwater Pump (turbine driven) .................................................................................................................................... 19 Table 6.17-1 Response Time Allocation for HSGL for ESF actuation - MSIS actuated MSIVs ................ 20 Table 6.17-2 Response Time Allocation for HSGL for ESF actuation - MSIS actuated MFIVs ................. 20 Table 6.18-1 Response Time Allocation for CREVAS for ESF actuation - CREVAS actuated isolation dampers ................................................................................................................................. 20 Table 6.18-2 Response Time Allocation for CREVAS for ESF actuation - Emergency makeup ACU fan 20 Table 6.19-1 Response Time Allocation for FHEVAS for ESF actuation - FHEVAS actuated isolation dampers ................................................................................................................................. 21 Table 6.19-2 Response Time Allocation for FHEVAS for ESF actuation - Emergency makeup ACU fan 21 Table 6.20-1 Response Time Allocation for CPIAS for ESF actuation - CPIAS actuated isolation valves 21 Table 7.21-1 Signal Path for each ESF-CCS Response Time ................................................................... 98 KEPCO & KHNP ix

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 LIST OF FIGURES Figure 7.1-1 LPP Reactor Trip Function ..................................................................................................... 22 Figure 7.1-2 Response Time Analysis for PPS........................................................................................... 22 Figure 7.2-1 HPP Reactor Trip Function ..................................................................................................... 23 Figure 7.2-2 Response Time Analysis for PPS........................................................................................... 24 Figure 7.3-1 LSGL Reactor Trip Function ................................................................................................... 25 Figure 7.3-2 Response Time Analysis for PPS........................................................................................... 25 Figure 7.4-1 HSGL Reactor Trip Function .................................................................................................. 26 Figure 7.4-2 Response Time Analysis for PPS........................................................................................... 26 Figure 7.5-1 LSGP Reactor Trip Function .................................................................................................. 27 Figure 7.5-2 Response Time Analysis for PPS........................................................................................... 28 Figure 7.6-1 HCP Reactor Trip Function .................................................................................................... 28 Figure 7.6-2 Response Time Analysis for PPS........................................................................................... 29 Figure 7.7-1 LRCF Reactor Trip Function ................................................................................................... 30 Figure 7.7-2 Response Time Analysis for PPS........................................................................................... 30 Figure 7.8-1 HVOPT Reactor Trip Function................................................................................................ 31 Figure 7.8-2 Response Time Analysis for PPS........................................................................................... 31 Figure 7.9-1 HLPL Reactor Trip Function ................................................................................................... 32 Figure 7.9-2 Response Time Analysis for PPS........................................................................................... 33 Figure 7.10-1 Response Time Analysis for ENFMS Detector .................................................................... 34 Figure 7.10-2 Response Time Analysis for CPCS ...................................................................................... 34 Figure 7.10-3 Response Time Analysis for PPS ........................................................................................ 35 Figure 7.10-4 Response Time Analysis for CEA Positions ......................................................................... 36 Figure 7.10-5 Response Time Analysis for CPCS ...................................................................................... 36 Figure 7.10-6 Response Time Analysis for PPS ........................................................................................ 37 Figure 7.10-7 Response Time Analysis for CEAC Penalty Factor ............................................................. 38 Figure 7.10-8 Response Time Analysis for CPCS ...................................................................................... 39 Figure 7.10-9 Response Time Analysis for PPS ........................................................................................ 40 Figure 7.11-1 Response Time Analysis for ENFMS Detector .................................................................... 41 Figure 7.11-2 Response Time Analysis for CPCS ...................................................................................... 41 Figure 7.11-3 Response Time Analysis for PPS ........................................................................................ 42 Figure 7.11-4 Response Time Analysis for CEA Positions ......................................................................... 43 Figure 7.11-5 Response Time Analysis for CPCS ...................................................................................... 43 Figure 7.11-6 Response Time Analysis for PPS ........................................................................................ 44 Figure 7.11-7 Response Time Analysis for Cold Leg Temperature............................................................ 45 KEPCO & KHNP x

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 Figure 7.11-8 Response Time Analysis for CPCS ...................................................................................... 45 Figure 7.11-9 Response Time Analysis for PPS ........................................................................................ 46 Figure 7.11-10 Response Time Analysis for Hot Leg Temperature ........................................................... 47 Figure 7.11-11 Response Time Analysis for CPCS .................................................................................... 47 Figure 7.11-12 Response Time Analysis for PPS ...................................................................................... 48 Figure 7.11-13 Response Time Analysis for Primary Coolant Pump Shaft Speed .................................... 49 Figure 7.11-14 Response Time Analysis for CPCS .................................................................................... 49 Figure 7.11-15 Response Time Analysis for PPS ...................................................................................... 50 Figure 7.11-16 Response Time Analysis for Reactor Coolant Pressure .................................................... 51 Figure 7.11-17 Response Time Analysis for CPCS .................................................................................... 51 Figure 7.11-18 Response Time Analysis for PPS ...................................................................................... 52 Figure 7.11-19 Response Time Analysis for CEAC Penalty Factor ........................................................... 53 Figure 7.11-20 Response Time Analysis for CPCS .................................................................................... 53 Figure 7.11-21 Response Time Analysis for PPS ...................................................................................... 54 Figure 7.12-1 Response Time Analysis for Safety Injection ....................................................................... 55 Figure 7.12-2 Response Time Analysis for PPS ........................................................................................ 55 Figure 7.12-3 Response Time Analysis for ESF-CCS ................................................................................ 56 Figure 7.12-4 Response Time Analysis for CIAS actuated low volume purge valves ................................ 57 Figure 7.12-5 Response Time Analysis for PPS ........................................................................................ 57 Figure 7.12-6 Response Time Analysis for ESF-CCS ................................................................................ 58 Figure 7.12-7 Response Time Analysis for Other CIAS actuated Valves .................................................. 59 Figure 7.12-8 Response Time Analysis for PPS ........................................................................................ 59 Figure 7.12-9 Response Time Analysis for ESF-CCS when loss of offsite power ..................................... 60 Figure 7.12-10 Response Time Analysis for ESF-CCS when offsite power is available ............................ 61 Figure 7.13-1 Response Time Analysis for Safety Injection ....................................................................... 62 Figure 7.13-2 Response Time Analysis for PPS ........................................................................................ 62 Figure 7.13-3 Response Time Analysis for ESF-CCS ................................................................................ 63 Figure 7.13-4 Response Time Analysis for CIAS actuated low volume purge valves ................................ 64 Figure 7.13-5 Response Time Analysis for PPS ........................................................................................ 64 Figure 7.13-6 Response Time Analysis for ESF-CCS ................................................................................ 65 Figure 7.13-7 Response Time Analysis for Other CIAS actuated valves ................................................... 66 Figure 7.13-8 Response Time Analysis for PPS ........................................................................................ 66 Figure 7.13-9 Response Time Analysis for ESF-CCS when loss of offsite power ..................................... 67 Figure 7.13-10 Response Time Analysis for ESF-CCS when offsite power is available ............................ 68 Figure 7.13-11 Response Time Analysis for MSIS actuated MSIVs .......................................................... 68 Figure 7.13-12 Response Time Analysis for PPS ...................................................................................... 69 KEPCO & KHNP xi

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 Figure 7.13-13 Response Time Analysis for ESF-CCS .............................................................................. 69 Figure 7.13-14 Response Time Analysis for MSIS actuated MFIVs .......................................................... 70 Figure 7.13-15 Response Time Analysis for PPS ...................................................................................... 70 Figure 7.13-16 Response Time Analysis for ESF-CCS .............................................................................. 71 Figure 7.14-1 Response Time Analysis for Containment Spray Pump ...................................................... 72 Figure 7.14-2 Response Time Analysis for PPS ........................................................................................ 72 Figure 7.14-3 Response Time Analysis for ESF-CCS when loss of offsite power ..................................... 73 Figure 7.14-4 Response Time Analysis for ESF-CCS when offsite power is available .............................. 74 Figure 7.14-5 Response Time Analysis for Containment isolation valves closed on CSAS ...................... 75 Figure 7.14-6 Response Time Analysis for PPS ........................................................................................ 75 Figure 7.14-7 Response Time Analysis for ESF-CCS when loss of offsite power ..................................... 76 Figure 7.14-8 Response Time Analysis for ESF-CCS when offsite power is available .............................. 77 Figure 7.15-1 Response Time Analysis for MSIS actuated MSIVs ............................................................ 78 Figure 7.15-2 Response Time Analysis for PPS ........................................................................................ 78 Figure 7.15-3 Response Time Analysis for ESF-CCS ................................................................................ 79 Figure 7.15-4 Response Time Analysis for MSIS actuated MFIVs............................................................. 80 Figure 7.15-5 Response Time Analysis for PPS ........................................................................................ 80 Figure 7.15-6 Response Time Analysis for ESF-CCS ................................................................................ 81 Figure 7.16-1 Response Time Analysis for Auxiliary Feedwater Pump (motor driven) .............................. 82 Figure 7.16-2 Response Time Analysis for PPS ........................................................................................ 82 Figure 7.16-3 Response Time Analysis for ESF-CCS when loss of offsite power ..................................... 83 Figure 7.16-4 Response Time Analysis for Auxiliary Feedwater Pump (turbine driven) ............................ 84 Figure 7.16-5 Response Time Analysis for PPS ........................................................................................ 84 Figure 7.16-6 Response Time Analysis for ESF-CCS ................................................................................ 85 Figure 7.17-1 Response Time Analysis for MSIS actuated MSIVs ............................................................ 86 Figure 7.17-2 Response Time Analysis for PPS ........................................................................................ 86 Figure 7.17-3 Response Time Analysis for ESF-CCS ................................................................................ 87 Figure 7.17-4 Response Time Analysis for MSIS actuated MFIVs............................................................. 88 Figure 7.17-5 Response Time Analysis for PPS ........................................................................................ 88 Figure 7.17-6 Response Time Analysis for ESF-CCS ................................................................................ 89 Figure 7.18-1 Response Time Analysis for CREVAS actuated isolation dampers..................................... 90 Figure 7.18-2 Response Time Analysis for RMS ........................................................................................ 90 Figure 7.18-3 Response Time Analysis for ESF-CCS ................................................................................ 91 Figure 7.18-4 Response Time Analysis for Emergency makeup ACU fan ................................................. 91 Figure 7.18-5 Response Time Analysis for RMS ........................................................................................ 92 Figure 7.18-6 Response Time Analysis for ESF-CCS ................................................................................ 92 KEPCO & KHNP xii

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 Figure 7.19-1 Response Time Analysis for FHEVAS actuated isolation dampers ..................................... 93 Figure 7.19-2 Response Time Analysis for RMS ........................................................................................ 93 Figure 7.19-3 Response Time Analysis for ESF-CCS ................................................................................ 94 Figure 7.19-4 Response Time Analysis for Emergency ACU fan ............................................................... 94 Figure 7.19-5 Response Time Analysis for RMS ........................................................................................ 95 Figure 7.19-6 Response Time Analysis for ESF-CCS ................................................................................ 95 Figure 7.20-1 Response Time Analysis for CPIAS actuated isolation valves ............................................ 96 Figure 7.20-2 Response Time Analysis for RMS ........................................................................................ 96 Figure 7.20-3 Response Time Analysis for ESF-CCS ................................................................................ 97 KEPCO & KHNP xiii

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 ACRONYMS AND ABBREVIATIONS ACU air cleaning unit AFAS auxiliary feedwater actuation signal AIM analog input module APC-S auxiliary process cabinet - safety BP bistable processor BTP branch technical position CEA control element assembly CEAC control element assembly calculator CEDM control element drive mechanism CIAS containment isolation actuation signal CPCS core protection calculator system CPIAS containment purge isolation actuation signal CPU central processing unit CREVAS control room emergency ventilation actuation signal CSAS containment spray actuation signal CTRLM control module DCD design control document DOM digital output module EDG emergency diesel generator ENFMS ex-core neutron flux monitoring system ESF engineered safety features ESF-CCS engineered safety feature - component control system FHEVAS fuel handling area emergency ventilation actuation signal HCP high containment pressure HHCP high-high containment pressure HLPD high local power density HLPL high logarithmic power level HPP high pressurizer pressure HSGL high steam generator level HVOPT high variable overpower trip I&C instrumentation and control IR interposing relay ITAAC Inspections, tests, analyses, and acceptance criteria LCL local coincidence logic LDNBR low departure from nucleate boiling ratio LPP low pressurizer pressure LRCF low reactor coolant flow LSGL low steam generator level LSGP low steam generator pressure MFIV main feedwater isolation valve MSIS main steam isolation signal MSIV main steam isolation valve KEPCO & KHNP xiv

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 NRC U.S. Nuclear Regulatory Commission PLC programmable logic control PPS plant protection system PROM programmable read only memory RCPSSSS reactor coolant pump shaft speed sensing system RSPT reed switch position transmitter RT reactor trip RTD resistance temperature detector RTSS reactor trip switchgear system SDL serial data link SIAS safety injection actuation signal SRP standard review plan TD time delay KEPCO & KHNP xv

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 1 INTRODUCTION 1.1 Purpose The purpose of this technical report is to demonstrate that the sum of individual response time allocated to each component on the critical path of safety I&C system functions does not exceed the response time assumed in the APR1400 safety analysis.

This technical report also demonstrates that the safety I&C system for APR1400 conforms to NUREG-0800 branch technical position (BTP) 7-21.

1.2 Scope This technical report provides the response time analysis of APR1400 safety I&C system, which includes the response times of the reactor trip (RT) system and the engineered safety features (ESF) actuation system.

The response time analysis of safety I&C system consists of defining the response time requirement for each safety I&C system function, determining the safety system signal path for each trip function, allocating individual response time to each component on the signal path, and analyzing safety system response time for each trip function.

This document also provides conformance of the safety I&C system of APR1400 to the seven acceptance criteria of NUREG-0800 BTP 7-21.

KEPCO & KHNP 1

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 2 CODES AND STANDARD This section describes the applicable or reference codes, regulations and standard used for the basis of response time analysis for APR1400 safety I&C system. The general design criteria (GDC) is described to identify the overall requirements for the response time, while these criteria are also addressed in the APR1400 design control document (DCD) (Reference 1) and the Safety I&C System TeR (Reference 2) as the compliance commitment for the response time.

2.1. GDC 10, Reactor Design, 10CFR50 Appendix A.

2.2. GDC 13, Instrumentation and Control, 10CFR50 Appendix A.

2.3. GDC 20, Protection System Functions, 10CFR50 Appendix A.

2.4. GDC 29, Protection Against Anticipated Operational Occurrences, 10CFR50 Appendix A.

2.5. Guidance on Digital Computer Real-Time Performance, NUREG-0800 BTP 7-21, Revision 5.

2.6. Setpoints for Nuclear Safety-Related Instrumentation, ANSI/ISA-67.04, Part I, 1994.

KEPCO & KHNP 2

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 3 SAFETY I&C SYSTEM DESCRIPTION 3.1 Safety Functions The safety functions of safety I&C system regarding response time analysis consist of RT functions and ESF actuation functions. The safety I&C system is designed in accordance with Sections 2.1 through 2.6.

All trip parameters of RT functions and ESF actuation functions are as follows:

(1) RT functions Low Pressurizer Pressure (LPP)

High Pressurizer Pressure (HPP)

Low Steam Generator Level (LSGL)

High Steam Generator Level (HSGL)

Low Steam Generator Pressure (LSGP)

High Containment Pressure (HCP)

Low Reactor Coolant Flow (LRCF)

High Local Power Density (HLPD)

Low Departure from Nucleate Boiling Ratio (LDNBR)

High Variable Overpower Trip (HVOPT)

High Logarithmic Power Level (HLPL)

(2) ESF actuation functions Low Pressurizer Pressure

- Safety Injection

- Containment Isolation High Containment Pressure

- Safety injection

- Containment isolation

- Main steam isolation High-High Containment Pressure (HHCP)

- Containment spray pump

- Containment isolation valves closed on containment spray actuation signal (CSAS)

Low Steam Generator Pressure

- Main steam isolation Low Steam Generator Level

- Auxiliary feedwater pump (motor driven)

- Auxiliary feedwater pump (turbine driven)

High Steam Generator Level

- Main steam isolation Control Room Emergency Ventilation Actuation Signal (CREVAS)

- CREVAS actuated isolation dampers

- Emergency makeup air cleaning unit (ACU) fan KEPCO & KHNP 3

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 Fuel Handling Area Emergency Ventilation Actuation Signal (FHEVAS)

- FHEVAS actuated isolation dampers

- emergency makeup ACU fan Containment Purge Isolation Actuation Signal (CPIAS)

- CPIAS actuated isolation dampers 3.2 Assumptions 3.2.1 If a total allocated response time is the same as its response time requirement, it is assumed that sufficient margin between an individual component response time and its allocated response time is maintained.

3.2.2 Response time requirements for RT function do not include Control Element Drive Mechanism (CEDM) release time and rod drop time that are assumed in the safety analysis.

3.2.3 Response time allocations for transmitters, auxiliary process cabinet - safety (APC-S), plant protection system (PPS), core protection calculator system (CPCS), engineered safety feature -

component control system (ESF-CCS), reactor trip switchgear system (RTSS), radiation monitoring system (RMS), damper, fan, pump and valve are based on actual response time from Shin-Kori Nuclear Power Plant Units 3 and 4. These will be confirmed for as-built APR1400 components through APR1400 design certification inspections, tests, analyses, and acceptance criteria (ITAAC).

3.2.4 In order to ensure 75% maximum central processing unit (CPU) load, configuration restrictions and tests required by Reference 5 will be incorporated into the CPCS design. The PPS and ESF-CCS will be designed not to exceed 70% of CPU full load.

KEPCO & KHNP 4

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 4 RESPONSE TIME REQUIREMENTS The response time requirements for safety I&C system trip parameters are described in Tables 4.1 and 4.2 below and based on Tables 7.2-5 and 7.3-7 of the DCD (Reference 1). The safety analysis establishes an analytical limit in terms of a measured or calculated variable and a specific time after that value is reached to begin protective action. According to section 2.6 of this TeR, satisfying these two constraints will ensure that the safety limit will not be exceeded during anticipated operational occurrences and postulated accidents. The response times assumed in the safety analysis are established as the response time requirements for RT function and ESF actuation function.

4.1 Response Time Requirements for RT Functions Table 4.1-1 Response Times for RT Functions No. Function Response Time(s) 1 LPP 1.15 2 HPP 0.85 3 LSGL 1.25 4 HSGL 1.15 5 LSGP 1.15 6 HCP 1.15 7 LRCF 0.7 Ex-core neutron flux monitoring system (ENFMS) 1) 0.65 Detectors 8 HLPD 2)

CEA positions 1.45 2)

CEA calculator (CEAC) penalty factor 0.85 1)

ENFMS detectors 0.65 2)

CEA positions 1.45 3)

Cold leg temperature 8.65 3) 9 LDNBR Hot leg temperature 8.65 4)

Primary coolant pump shaft speed 0.45 5)

Reactor coolant pressure from pressurizer 0.95 2)

CEAC penalty factor 0.85 1) 10 HVOPT 0.55 1) 11 HLPL 0.55

1) Neutron detectors are exempt from response time testing. The response time of neutron flux signal portion of the channel is measured from the detector output or from the input of first electronic component in channel.

2) Response time is measured from the output of the sensor.

3) Response time is measured from the output of the resistance temperature detector (RTD). RTD response time is measured at least once per 18 months. The measured response time of the slowest RTD is less than or equal to 8.0 seconds.

KEPCO & KHNP 5

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2

4) The pulse transmitters measuring pump speed are exempt from response time testing. The response time is measured from the pulse shaper input.

5) Response time is measured from the output of the pressure transmitter. The transmitter response time is less than or equal to 0.3 second.

4.2 Response Time Requirements for ESF Actuation Functions Table 4.2-1 Response Times for ESF Actuation Functions

Response

No. Function Initiating Signal (1)

Time(s)

Safety Injection 40 Containment isolation actuation signal 1 LPP Containment 5 (CIAS) actuated low volume purge valves Isolation 2) 3)

Other CIAS actuated valves 83.5 / 62.0 Safety Injection 40 Containment CIAS actuated low volume purge valves 5

2) 3)

Isolation Other CIAS actuated valves 83.5 / 62.0 Main steam isolation signal (MSIS) 2 HCP actuated main steam isolation valves 6.35 Main Steam (MSIVs)

Isolation MSIS actuated main feedwater isolation 11.35 valves (MFIVs) 4),6) 5),6)

Containment spray pump 50.4 /28.5 3 HHCP 2) 3)

Containment isolation valves closed on CSAS 73.5 / 52.0 Main Steam MSIS actuated MSIVs 6.35 4 LSGP Isolation MSIS actuated MFIVs 11.35 4)

Auxiliary feedwater pump (motor driven) 61.45 5 LSGL Auxiliary feedwater pump (turbine driven) 61.45 Main Steam MSIS actuated MSIVs 6.35 6 HSGL Isolation MSIS actuated MFIVs 11.35 Control room air CREVAS actuated isolation 7),8) 8.4 7 CREVAS intake radiation - dampers 7),8),9)

High Emergency makeup ACU fan 5.0 FHEVAS actuated isolation 7),8),9)

Spent fuel pool 8.4 dampers 8 FHEVAS area radiation -

7),8)

High Emergency makeup ACU fan 5.0 Containment upper operating area / 7),8) 9 CPIAS CPIAS actuated isolation valves 9.9 operating area radiation - High KEPCO & KHNP 6

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 Notes

1) PPS cabinet delays are included.

2) A loss of offsite power. Emergency diesel generator (EDG) starting delay is included. Response time includes movement of valves and attainment of pump or blower discharge pressure.

3) Offsite power is available. EDG starting delay is not included. Response time includes movement of valves and attainment of pump or blower discharge pressure.

4) Same as No. 2. In addition, delays of load-sequencing are included.

5) Same as No. 3. In addition, delays of load-sequencing are included.

6) Spray line fill time is not included.

7) EDG starting delay is not included.

8) The response time of the radiation detectors is not included. The response time of the radiation signal portion of the channel is measured from the detector output or from the input of the first electronic component in channel to closure of dampers / valves or start fans.

9) Fan motor run-up time is not included since the building volume is too large to make a substantial change to pressure compared to the isolation functions.

KEPCO & KHNP 7

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 5 SIGNAL PATHS This section describes the signal path of the safety I&C system. The safety I&C system configuration required to determine signal paths of RT system and ESF actuation system is delineated in Sections 7.1, 7.2, and 7.3 of DCD (Reference 1) and Section 4 of the safety I&C system TeR (Reference 2). The APC-S is to perform the distribution of a transmitters output signal. If the output signal has another destination in addition to the PPS, the APC-S is located between the transmitter and the PPS to split and distribute the signal.

5.1 Response time of the RT system The signal path for each trip parameter of RT functions is provided in Table 5.1-1.

Table 5.1-1 Signal Path for RT Functions No. Parameter Signal Path 1 LPP 2 HPP Transmitter APC-S PPS RTSS 3 LSGL 4 HSGL Transmitter PPS RTSS 5 LSGP Transmitter APC-S PPS RTSS 6 HCP Transmitter PPS RTSS 7 LRCF Neutron Detectors ENFMS CPCS PPS ENFMS Detectors RTSS 8 HLPD CEA Positions Reed Switch Position Transmitter (RSPT) CPCS CEAC Penalty Factor PPS RTSS Neutron Detectors ENFMS CPCS PPS ENFMS Detectors RTSS Cold Leg Temperature Temperature Sensor CPCS PPS RTSS Hot Leg Temperature Primary Coolant Reactor coolant pump shaft speed sensing system 9 LDNBR Pump Shaft Speed (RCPSSSS) CPCS PPS RTSS Reactor Coolant Transmitter APC-S CPCS PPS RTSS Pressure CEA Positions RSPT CPCS PPS RTSS CEAC Penalty Factor 10 HVOPT Neutron Detectors ENFMS PPS RTSS 11 HLPL KEPCO & KHNP 8

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 5.2 Response time of the ESF actuation system The signal path for each trip parameter of ESF actuation system is provided in Table 5.2-1.

Table 5.2-1 Signal Path for ESF Actuation Functions No. Function Initiating Signal Signal Path Safety Injection CIAS actuated low volume Transmitter APC-S PPS 1 LPP Containment purge valves ESF-CCS Pump/Valve Isolation Other CIAS actuated Valves Safety Injection CIAS actuated low volume Containment purge valves 2 HCP Isolation Other CIAS actuated valves Transmitter PPS Main Steam MSIS actuated MSIVs ESF-CCS Pump/Valve Isolation MSIS actuated MFIVs Containment spray pump 3 HHCP Containment isolation valves closed on CSAS Main Steam MSIS actuated MSIVs 4 LSGP Isolation MSIS actuated MFIVs Transmitter APC-S PPS Auxiliary feedwater pump (motor driven) ESF-CCS Pump/Valve 5 LSGL Auxiliary feedwater pump (turbine driven)

Main Steam MSIS actuated MSIVs Transmitter PPS 6 HSGL Isolation MSIS actuated MFIVs ESF-CCS Pump/Valve CREVAS actuated Control room air isolation dampers 7 CREVAS intake radiation -

Emergency makeup High ACU fan FHEVAS actuated Spent fuel pool area isolation dampers RMS ESF-CCS 8 FHEVAS radiation - High Emergency makeup Damper/Fan/Valve ACU fan Containment upper operating area / CPIAS actuated 9 CPIAS operating area isolation valves radiation - High KEPCO & KHNP 9

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 6 RESPONSE TIME ALLOCATION This section describes the allocation of individual response time to each component on the critical signal path of the safety I&C system.

6.1 LPP for Reactor Trip Table 6.1-1 Response Time Allocation for LPP No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 APC-S 3 PPS 4 RTSS Total Requirement 1.150 6.2 HPP for Reactor Trip Table 6.2-1 Response Time Allocation for HPP No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 APC-S 3 PPS 4 RTSS Total Requirement 0.850 6.3 LSGL for Reactor Trip Table 6.3-1 Response Time Allocation for LSGL No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 APC-S 3 PPS 4 RTSS Total Requirement 1.250 KEPCO & KHNP 10

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 6.4 HSGL for Reactor Trip Table 6.4-1 Response Time Allocation for HSGL No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 PPS 3 RTSS Total Requirement 1.150 6.5 LSGP for Reactor Trip Table 6.5-1 Response Time Allocation for LSGP No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 APC-S 3 PPS 4 RTSS Total Requirement 1.150 6.6 HCP for Reactor Trip Table 6.6-1 Response Time Allocation for HCP No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 PPS 3 RTSS Total Requirement 1.150 6.7 LRCF for Reactor Trip Table 6.7-1 Response Time Allocation for LRCF No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 PPS 3 RTSS Total Requirement 0.7 KEPCO & KHNP 11

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 6.8 HVOPT for Reactor Trip Table 6.8-1 Response Time Allocation for HVOPT No. Equipment Allocated Response Time (s)

Neutron TS 1

Detector 2 ENFMS 3 PPS 4 RTSS Total Requirement 0.550 6.9 HLPL for Reactor Trip Table 6.9-1 Response Time Allocation for HLPL No. Equipment Allocated Response Time (s)

Neutron 1 TS Detector 2 ENFMS 3 PPS 4 RTSS Total Requirement 0.550 6.10 HLPD FOR REACTOR TRIP 6.10.1 ENFMS Detectors Table 6.10-1 Response Time Allocation for ENFMS Detector (HLPD)

No. Equipment Allocated Response Time (s)

Neutron 1 TS Detector 2 ENFMS 3 CPCS 4 PPS 5 RTSS Total Requirement 0.650

The allocated response time of ENFMS is included in that of CPCS.

KEPCO & KHNP 12

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 6.10.2 CEA Positions Table 6.10-2 Response Time Allocation for CEA Positions (HLPD)

No. Equipment Allocated Response Time (s) 1 RSPT TS 2 CPCS 3 PPS 4 RTSS Total Requirement 1.450 6.10.3 CEAC Penalty Factor Table 6.10-3 Response Time Allocation for CEAC Penalty Factor (HLPD)

No. Equipment Allocated Response Time (s) 1 RSPT TS 2 CPCS 3 PPS 4 RTSS Total Requirement 0.850 6.11 LDNBR for Reactor Trip 6.11.1 ENFMS Detectors Table 6.11-1 Response Time Allocation for ENFMS Detector (LDNBR)

No. Equipment Allocated Response Time (s)

Neutron 1 TS Detector 2 ENFMS 3 CPCS 4 PPS 5 RTSS Total Requirement 0.650

The allocated response time of ENFMS is included in that of CPCS.

KEPCO & KHNP 13

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 6.11.2 CEA Positions Table 6.11-2 Response Time Allocation for CEA Positions (LDNBR)

No. Equipment Allocated Response Time (s) 1 RSPT TS 2 CPCS 3 PPS 4 RTSS Total Requirement 1.450 6.11.3 Cold Leg Temperature Table 6.11-3 Response Time Allocation for Cold Leg Temperature (LDNBR)

No. Equipment Allocated Response Time (s)

Temperature TS 1

Sensor 2 CPCS 3 PPS 4 RTSS Total Requirement 8.650 6.11.4 Hot Leg Temperature Table 6.11-4 Response Time Allocation for Hot Leg Temperature (LDNBR)

No. Equipment Allocated Response Time (s)

Temperature 1 TS Sensor 2 CPCS 3 PPS 4 RTSS Total Requirement 8.650 6.11.5 Primary Coolant Pump Shaft Speed Table 6.11-5 Response Time Allocation for Primary Coolant Pump Shaft Speed (LDNBR)

No. Equipment Allocated Response Time (s) 1 RCPSSSS TS 2 CPCS 3 PPS KEPCO & KHNP 14

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 4 RTSS TS Total Requirement 0.450 6.11.6 Reactor Coolant Pressure from Pressurizer Table 6.11-6 Response Time Allocation for Reactor Coolant Pressure (LDNBR)

No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 APC-S 3 CPCS 4 PPS 5 RTSS Total Requirement 0.950 6.11.7 CEAC Penalty Factor Table 6.11-7 Response Time Allocation for CEAC Penalty Factor (LDNBR)

No. Equipment Allocated Response Time (s) 1 RSPT TS 2 CPCS 3 PPS 4 RTSS Total Requirement 0.850 6.12 LPP for ESF Actuation 6.12.1 Safety Injection Table 6.12-1 Response Time Allocation for LPP for ESF actuation - Safety Injection Actuation Signal (SIAS)

No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 APC-S 3 PPS 4 ESF-CCS 5 SI Pump Total Requirement 40.000 KEPCO & KHNP 15

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 6.12.2 Containment Isolation Table 6.12-2 Response Time Allocation for LPP for ESF actuation - CIAS actuated low volume purge valves No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 APC-S 3 PPS 4 ESF-CCS 5 Valve Total Requirement 5.000 Table 6.12-3 Response Time Allocation for LPP for ESF actuation - Other CIAS actuated valves No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 APC-S 3 PPS 4 ESF-CCS 5 Valve Total Requirement 83.500 / 62.000 6.13 HCP for ESF Actuation 6.13.1 Safety Injection Table 6.13-1 Response Time Allocation for HCP for ESF actuation - SIAS No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 PPS 3 ESF-CCS 4 SI Pump Total Requirement 40.000 KEPCO & KHNP 16

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 6.13.2 Containment Isolation Table 6.13-2 Response Time Allocation for HCP for ESF actuation - CIAS actuated low volume purge valves No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 PPS 3 ESF-CCS 4 Valve Total Requirement 5.000 Table 6.13-3 Response Time Allocation for HCP for ESF actuation - CIAS actuated low volume purge valves No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 PPS 3 ESF-CCS 4 Valve Total Requirement 83.500 / 62.000 6.13.3 Main Steam Isolation Table 6.13-4 Response Time Allocation for HCP for ESF actuation - MSIS actuated MSIVs No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 PPS 3 ESF-CCS 4 Valve Total Requirement 6.350 Table 6.13-5 Response Time Allocation for HCP for ESF actuation - MSIS actuated MFIVs No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 PPS 3 ESF-CCS 4 Valve Total KEPCO & KHNP 17

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 Requirement 11.350 6.14 HHCP for ESF Actuation 6.14.1 Containment Spray Pump Table 6.14-1 Response Time Allocation for HHCP for ESF actuation - Containment Spray Pump No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 PPS 3 ESF-CCS 4 Pump Total Requirement 50.400 / 28.500 6.14.2 Containment Isolation Valves Closed on CSAS Table 6.14-2 Response Time Allocation for HHCP for ESF actuation - Containment Isolation Valves Closed on CSAS No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 PPS 3 ESF-CCS 4 Valve Total Requirement 73.500 / 52.000 6.15 LSGP FOR ESF ACTUATION 6.15.1 Main Steam Isolation Table 6.15-1 Response Time Allocation for LSGP for ESF actuation - MSIS actuated MSIVs No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 APC-S 3 PPS 4 ESF-CCS 5 Valve KEPCO & KHNP 18

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 Total TS Requirement 6.350 Table 6.15-2 Response Time Allocation for LSGP for ESF actuation - MSIS actuated MFIVs No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 APC-S 3 PPS 4 ESF-CCS 5 Valve Total Requirement 11.350 6.16 LSGL FOR ESF ACTUATION 6.16.1 Auxiliary Feedwater Pump (motor driven)

Table 6.16-1 Response Time Allocation for LSGL for ESF actuation - Auxiliary Feedwater Pump (motor driven)

No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 APC-S 3 PPS 4 ESF-CCS 5 Pump Total Requirement 61.450 6.16.2 Auxiliary Feedwater Pump (turbine driven)

Table 6.16-2 Response Time Allocation for LSGL for ESF actuation - Auxiliary Feedwater Pump (turbine driven)

No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 APC-S 3 PPS 4 ESF-CCS 5 Pump Total Requirement 61.450 KEPCO & KHNP 19

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 6.17 HSGL for ESF Actuation 6.17.1 Main Steam Isolation Table 6.17-1 Response Time Allocation for HSGL for ESF actuation - MSIS actuated MSIVs No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 PPS 3 ESF-CCS 4 Valve Total Requirement 6.350 Table 6.17-2 Response Time Allocation for HSGL for ESF actuation - MSIS actuated MFIVs No. Equipment Allocated Response Time (s) 1 Transmitter TS 2 PPS 3 ESF-CCS 4 Valve Total Requirement 11.350 6.18 CREVAS 6.18.1 Control Room Air Intake Radiation -High Table 6.18-1 Response Time Allocation for CREVAS for ESF actuation - CREVAS actuated isolation dampers Propagation No. Equipment Allocated Response Time (s) 1 RMS TS 2 ESF-CCS 3 Damper Total Requirement 8.400 Table 6.18-2 Response Time Allocation for CREVAS for ESF actuation - Emergency makeup ACU fan Propagation No. Equipment Allocated Response Time (s) 1 RMS TS 2 ESF-CCS 3 Fan Total KEPCO & KHNP 20

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 Requirement 5.000 6.19 FHEVAS 6.19.1 Spent Fuel Pool Area Radiation - High Table 6.19-1 Response Time Allocation for FHEVAS for ESF actuation - FHEVAS actuated isolation dampers Propagation No. Equipment Allocated Response Time (s) 1 RMS TS 2 ESF-CCS 3 Damper Total Requirement 8.400 Table 6.19-2 Response Time Allocation for FHEVAS for ESF actuation - Emergency makeup ACU fan Propagation No. Equipment Allocated Response Time (s) 1 RMS TS 2 ESF-CCS 3 Fan Total Requirement 5.000 6.20 CPIAS 6.20.1 Containment Upper Operating Area / Operating Area Radiation - High Table 6.20-1 Response Time Allocation for CPIAS for ESF actuation - CPIAS actuated isolation valves Propagation No. Equipment Allocated Response Time (s) 1 RMS TS 2 ESF-CCS 3 Valves Total Requirement 9.900 KEPCO & KHNP 21

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7 RESPONSE TIME ANALYSIS This section provides the results of the safety I&C system response time analysis for each trip function.

The allocated response times are verified by the vendor specifications or the worst case response time analysis.

7.1 LPP for Reactor Trip TS Figure 7.1-1 LPP Reactor Trip Function Notes TS 7.1.1. PPS TS Figure 7.1-2 Response Time Analysis for PPS KEPCO & KHNP 22

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 Notes TS 7.2 HPP for Reactor Trip TS Figure 7.2-1 HPP Reactor Trip Function Notes TS KEPCO & KHNP 23

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.2.1. PPS TS Figure 7.2-2 Response Time Analysis for PPS Notes TS 7.3 LSGL for Reactor Trip KEPCO & KHNP 24

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.3-1 LSGL Reactor Trip Function Notes TS 7.3.1. PPS TS Figure 7.3-2 Response Time Analysis for PPS Notes TS KEPCO & KHNP 25

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 (1) + (2) + (3) + (4) + (5) + (6) + (7) = 642 ms TS 7.4 HSGL for Reactor Trip TS Figure 7.4-1 HSGL Reactor Trip Function Notes TS 7.4.1. PPS TS Figure 7.4-2 Response Time Analysis for PPS Notes TS KEPCO & KHNP 26

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.5 LSGP FOR REACTOR TRIP TS Figure 7.5-1 LSGP Reactor Trip Function Notes TS 7.5.1. PPS KEPCO & KHNP 27

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.5-2 Response Time Analysis for PPS Notes TS 7.6 HCP for Reactor Trip TS Figure 7.6-1 HCP Reactor Trip Function Notes KEPCO & KHNP 28

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.6.1. PPS TS Figure 7.6-2 Response Time Analysis for PPS Notes TS 7.7 LRCF for Reactor Trip KEPCO & KHNP 29

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.7-1 LRCF Reactor Trip Function Notes TS 7.7.1. PPS TS Figure 7.7-2 Response Time Analysis for PPS Notes TS KEPCO & KHNP 30

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.8 HVOPT for Reactor Trip TS Figure 7.8-1 HVOPT Reactor Trip Function Notes TS 7.8.1. PPS TS Figure 7.8-2 Response Time Analysis for PPS Notes KEPCO & KHNP 31

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.9 HLPL for Reactor Trip TS Figure 7.9-1 HLPL Reactor Trip Function Notes TS 7.9.1. PPS KEPCO & KHNP 32

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.9-2 Response Time Analysis for PPS Notes TS 7.10 HLPD FOR REACTOR TRIP 7.10.1 ENFMS Detector KEPCO & KHNP 33

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.10-1 Response Time Analysis for ENFMS Detector Notes TS 7.10.1.1 CPCS TS Figure 7.10-2 Response Time Analysis for CPCS Notes TS KEPCO & KHNP 34

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.10.1.2 PPS TS Figure 7.10-3 Response Time Analysis for PPS Notes TS KEPCO & KHNP 35

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.10.2 CEA Positions TS Figure 7.10-4 Response Time Analysis for CEA Positions Notes TS 7.10.2.1. CPCS TS Figure 7.10-5 Response Time Analysis for CPCS Notes KEPCO & KHNP 36

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.10.2.2 PPS TS Figure 7.10-6 Response Time Analysis for PPS Notes TS TS KEPCO & KHNP 37

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.10.3 CEAC Penalty Factor TS Figure 7.10-7 Response Time Analysis for CEAC Penalty Factor Notes TS 7.10.3.1 CPCS KEPCO & KHNP 38

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.10-8 Response Time Analysis for CPCS Notes TS 7.10.3.2. PPS KEPCO & KHNP 39

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.10-9 Response Time Analysis for PPS Notes TS 7.11 LDNBR FOR REACTOR TRIP 7.11.1 ENFMS Detectors KEPCO & KHNP 40

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.11-1 Response Time Analysis for ENFMS Detector Notes TS 7.11.1.1. CPCS TS Figure 7.11-2 Response Time Analysis for CPCS Notes TS KEPCO & KHNP 41

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.11.1.2 PPS TS Figure 7.11-3 Response Time Analysis for PPS Notes TS 7.11.2 CEA Positions KEPCO & KHNP 42

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.11-4 Response Time Analysis for CEA Positions Notes TS 7.11.2.1 CPCS TS Figure 7.11-5 Response Time Analysis for CPCS Notes TS KEPCO & KHNP 43

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.11.2.2 PPS TS Figure 7.11-6 Response Time Analysis for PPS Notes TS KEPCO & KHNP 44

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.11.3 Cold Leg Temperature TS Figure 7.11-7 Response Time Analysis for Cold Leg Temperature Notes TS 7.11.3.1 CPCS TS Figure 7.11-8 Response Time Analysis for CPCS Notes TS KEPCO & KHNP 45

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.11.3.2 PPS TS Figure 7.11-9 Response Time Analysis for PPS Notes TS 7.11.4 Hot Leg Temperature KEPCO & KHNP 46

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.11-10 Response Time Analysis for Hot Leg Temperature Notes TS 7.11.4.1 CPCS TS Figure 7.11-11 Response Time Analysis for CPCS Notes TS KEPCO & KHNP 47

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.11.4.2 PPS TS Figure 7.11-12 Response Time Analysis for PPS Notes TS 7.11.5 Primary Coolant Pump Shaft Speed KEPCO & KHNP 48

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.11-13 Response Time Analysis for Primary Coolant Pump Shaft Speed Notes TS 7.11.5.1. CPCS TS Figure 7.11-14 Response Time Analysis for CPCS Notes TS KEPCO & KHNP 49

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.11.5.2 PPS TS Figure 7.11-15 Response Time Analysis for PPS Notes TS 7.11.6 Reactor Coolant Pressure from Pressurizer KEPCO & KHNP 50

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.11-16 Response Time Analysis for Reactor Coolant Pressure Notes TS 7.11.6.1 CPCS TS Figure 7.11-17 Response Time Analysis for CPCS Notes TS KEPCO & KHNP 51

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.11.6.2 PPS TS Figure 7.11-18 Response Time Analysis for PPS Notes TS 7.11.7 CEAC Penalty Factor KEPCO & KHNP 52

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.11-19 Response Time Analysis for CEAC Penalty Factor Notes TS 7.11.7.1 CPCS TS Figure 7.11-20 Response Time Analysis for CPCS Notes KEPCO & KHNP 53

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.11.7.2. PPS TS Figure 7.11-21 Response Time Analysis for PPS Notes TS 7.12 LPP FOR ESF ACTUATION KEPCO & KHNP 54

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.12.1 Safety Injection TS Figure 7.12-1 Response Time Analysis for Safety Injection Notes TS 7.12.1.1 PPS TS Figure 7.12-2 Response Time Analysis for PPS Notes TS KEPCO & KHNP 55

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.12.1.2 ESF-CCS TS Figure 7.12-3 Response Time Analysis for ESF-CCS Notes TS KEPCO & KHNP 56

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.12.2 Containment Isolation 7.12.2.1. CIAS actuated low volume purge valves TS Figure 7.12-4 Response Time Analysis for CIAS actuated low volume purge valves Notes TS 7.12.2.1.1. PPS TS Figure 7.12-5 Response Time Analysis for PPS Notes KEPCO & KHNP 57

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.12.2.1.2. ESF-CCS TS Figure 7.12-6 Response Time Analysis for ESF-CCS Notes TS 7.12.2.2. Other CIAS actuated Valves KEPCO & KHNP 58

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.12-7 Response Time Analysis for Other CIAS actuated Valves Notes TS 7.12.2.2.1 PPS TS Figure 7.12-8 Response Time Analysis for PPS Notes TS KEPCO & KHNP 59

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.12.2.2.2 ESF-CCS TS Figure 7.12-9 Response Time Analysis for ESF-CCS when loss of offsite power Notes TS KEPCO & KHNP 60

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.12-10 Response Time Analysis for ESF-CCS when offsite power is available Notes TS 7.13 HCP for ESF Actuation 7.13.1 Safety Injection KEPCO & KHNP 61

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.13-1 Response Time Analysis for Safety Injection Notes TS 7.13.1.1 PPS TS Figure 7.13-2 Response Time Analysis for PPS Notes TS KEPCO & KHNP 62

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.13.1.2 ESF-CCS TS Figure 7.13-3 Response Time Analysis for ESF-CCS Notes TS KEPCO & KHNP 63

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.13.2 Containment Isolation 7.13.2.1 CIAS actuated low volume purge valves TS Figure 7.13-4 Response Time Analysis for CIAS actuated low volume purge valves Notes TS 7.13.2.1.1 PPS TS Figure 7.13-5 Response Time Analysis for PPS Notes TS KEPCO & KHNP 64

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.13.2.1.2 ESF-CCS TS Figure 7.13-6 Response Time Analysis for ESF-CCS Notes TS 7.13.2.2 Other CIAS actuated valves KEPCO & KHNP 65

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.13-7 Response Time Analysis for Other CIAS actuated valves Notes TS 7.13.2.2.1 PPS TS Figure 7.13-8 Response Time Analysis for PPS Notes TS KEPCO & KHNP 66

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.13.2.2.2 ESF-CCS TS Figure 7.13-9 Response Time Analysis for ESF-CCS when loss of offsite power Notes TS KEPCO & KHNP 67

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.13-10 Response Time Analysis for ESF-CCS when offsite power is available Notes TS 7.13.3 Main Steam Isolation 7.13.3.1 MSIS actuated MSIVs TS Figure 7.13-11 Response Time Analysis for MSIS actuated MSIVs KEPCO & KHNP 68

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 Notes TS 7.13.3.1.1 PPS TS Figure 7.13-12 Response Time Analysis for PPS Notes TS 7.13.3.1.2 ESF-CCS TS Figure 7.13-13 Response Time Analysis for ESF-CCS Notes TS KEPCO & KHNP 69

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.13.3.2 MSIS actuated MFIVs TS Figure 7.13-14 Response Time Analysis for MSIS actuated MFIVs Notes TS 7.13.3.2.1 PPS TS Figure 7.13-15 Response Time Analysis for PPS Notes KEPCO & KHNP 70

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.13.3.2.2 ESF-CCS TS Figure 7.13-16 Response Time Analysis for ESF-CCS Notes TS 7.14 HHCP for ESF Actuation 7.14.1 Containment spray pump KEPCO & KHNP 71

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.14-1 Response Time Analysis for Containment Spray Pump Notes TS 7.14.1.1. PPS TS Figure 7.14-2 Response Time Analysis for PPS Notes TS KEPCO & KHNP 72

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.14.1.2 ESF-CCS TS Figure 7.14-3 Response Time Analysis for ESF-CCS when loss of offsite power Notes TS KEPCO & KHNP 73

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.14-4 Response Time Analysis for ESF-CCS when offsite power is available Notes TS KEPCO & KHNP 74

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.14.2 Containment isolation valves closed on CSAS TS Figure 7.14-5 Response Time Analysis for Containment isolation valves closed on CSAS Notes TS 7.14.2.1. PPS TS Figure 7.14-6 Response Time Analysis for PPS Notes TS KEPCO & KHNP 75

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.14.2.2 ESF-CCS TS Figure 7.14-7 Response Time Analysis for ESF-CCS when loss of offsite power Notes TS KEPCO & KHNP 76

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.14-8 Response Time Analysis for ESF-CCS when offsite power is available Notes TS 7.15 LSGP for ESF Actuation 7.15.1 Main Steam Isolation 7.15.1.1 MSIS actuated MSIVs KEPCO & KHNP 77

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.15-1 Response Time Analysis for MSIS actuated MSIVs Notes TS 7.15.1.1.1 PPS TS Figure 7.15-2 Response Time Analysis for PPS Notes TS KEPCO & KHNP 78

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.15.1.1.2. ESF-CCS TS Figure 7.15-3 Response Time Analysis for ESF-CCS Notes TS 7.15.1.2 MSIS actuated MFIVs KEPCO & KHNP 79

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.15-4 Response Time Analysis for MSIS actuated MFIVs Notes

1. Transmitter response time of 0.2 s will be confirmed by vendor specification. TS

2. APC-S response time of 0.05 s will be confirmed by vendor specification.

3. The PPS and ESF-CCS worst case response times are analyzed in following subsections.

4. Valve response time of 4.5 s will be confirmed by vendor specification.

7.15.1.2.1 PPS TS Figure 7.15-5 Response Time Analysis for PPS Notes TS KEPCO & KHNP 80

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.15.1.2.2. ESF-CCS TS Figure 7.15-6 Response Time Analysis for ESF-CCS Notes TS 7.16 LSGL FOR ESF-ACTUATION 7.16.1 Auxiliary Feedwater Pump (motor driven)

KEPCO & KHNP 81

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.16-1 Response Time Analysis for Auxiliary Feedwater Pump (motor driven)

Notes TS 7.16.1.1. PPS TS Figure 7.16-2 Response Time Analysis for PPS Notes TS KEPCO & KHNP 82

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.16.1.2 ESF-CCS TS Figure 7.16-3 Response Time Analysis for ESF-CCS when loss of offsite power Notes TS KEPCO & KHNP 83

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.16.2 Auxiliary Feedwater Pump (turbine driven)

TS Figure 7.16-4 Response Time Analysis for Auxiliary Feedwater Pump (turbine driven)

Notes TS 7.16.2.1 PPS TS Figure 7.16-5 Response Time Analysis for PPS Notes TS KEPCO & KHNP 84

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.16.2.2 Auxiliary feedwater pump (turbine driven)

TS Figure 7.16-6 Response Time Analysis for ESF-CCS Notes TS 7.17 HSGL FOR ESF-ACTUATION KEPCO & KHNP 85

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.17.1 Main Steam Isolation 7.17.1.1 MSIS actuated MSIVs TS Figure 7.17-1 Response Time Analysis for MSIS actuated MSIVs Notes TS 7.17.1.1.1 PPS TS Figure 7.17-2 Response Time Analysis for PPS Notes TS KEPCO & KHNP 86

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.17.1.1.2 ESF-CCS TS Figure 7.17-3 Response Time Analysis for ESF-CCS Notes TS 7.17.1.2 MSIS actuated MFIVs KEPCO & KHNP 87

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.17-4 Response Time Analysis for MSIS actuated MFIVs Notes TS 7.17.1.2.1 PPS TS Figure 7.17-5 Response Time Analysis for PPS Notes TS KEPCO & KHNP 88

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.17.1.2.2 ESF-CCS TS Figure 7.17-6 Response Time Analysis for ESF-CCS Notes TS 7.18 CREVAS 7.18.1 Control room air intake radiation - High 7.18.1.1 CREVAS actuated isolation dampers KEPCO & KHNP 89

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.18-1 Response Time Analysis for CREVAS actuated isolation dampers Notes TS 7.18.1.1.1 RMS TS Figure 7.18-2 Response Time Analysis for RMS Note TS 7.18.1.1.2 ESF-CCS KEPCO & KHNP 90

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.18-3 Response Time Analysis for ESF-CCS Notes TS 7.18.1.2 Emergency makeup ACU fan TS Figure 7.18-4 Response Time Analysis for Emergency makeup ACU fan Notes KEPCO & KHNP 91

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.18.1.2.1 RMS TS Figure 7.18-5 Response Time Analysis for RMS Note TS 7.18.1.2.2 ESF-CCS TS Figure 7.18-6 Response Time Analysis for ESF-CCS Notes TS KEPCO & KHNP 92

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.19 FHEVAS 7.19.1 Spent fuel pool area radiation - High 7.19.1.1 FHEVAS actuated isolation dampers TS Figure 7.19-1 Response Time Analysis for FHEVAS actuated isolation dampers Notes TS 7.19.1.1.1 RMS TS Figure 7.19-2 Response Time Analysis for RMS Note TS 7.19.1.1.2 ESF-CCS KEPCO & KHNP 93

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.19-3 Response Time Analysis for ESF-CCS Notes TS 7.19.1.2 Emergency makeup ACU fan TS Figure 7.19-4 Response Time Analysis for Emergency ACU fan Notes KEPCO & KHNP 94

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.19.1.2.1 RMS TS Figure 7.19-5 Response Time Analysis for RMS Note TS 7.19.1.2.2 ESF-CCS TS Figure 7.19-6 Response Time Analysis for ESF-CCS Notes TS KEPCO & KHNP 95

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.20 CPIAS 7.20.1 Containment upper operating area / operating area radiation - High 7.20.1.1 CPIAS actuated isolation valves TS Figure 7.20-1 Response Time Analysis for CPIAS actuated isolation valves Notes TS 7.20.1.1.1 RMS TS Figure 7.20-2 Response Time Analysis for RMS Note TS 7.20.1.1.2 ESF-CCS KEPCO & KHNP 96

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS Figure 7.20-3 Response Time Analysis for ESF-CCS Notes TS KEPCO & KHNP 97

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.21 SIGNAL PATH OF THE ESF-CCS TS Table 7.21-1 Signal Path for each ESF-CCS Response Time TS KEPCO & KHNP 98

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 Table 7.21-1 Signal Path for each ESF-CCS Response Time (Continued) TS 7.21.1 Signal Path Case 1 TS KEPCO & KHNP 99

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.21.2 Signal Path Case 2 TS 7.21.3 Signal Path Case 3 TS KEPCO & KHNP 100

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS 7.21.4 Signal Path Case 4 TS 7.21.5 Signal Path Case 5 TS KEPCO & KHNP 101

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 7.21.6 Signal Path Case 6 TS 7.21.7 Signal Path Case 7 TS 7.21.8 Signal Path Case 8 TS KEPCO & KHNP 102

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS KEPCO & KHNP 103

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 8 REFERENCES

[1] DCD for the APR1400.

[2] APR1400-Z-J-NR-14001-P, Safety I&C System, Rev. 2, January 2018.

[3] APR1400-Z-J-NR-14005-P, Setpoint Methodology for Safety-Related Instrumentation, Rev. 2, January 2018.

[4] WCAP-16097-P-A, Common Qualified Platform Topical Report, Rev. 3, February 2013.

[5] APR1400-A-J-NR-14004-P(WCAP-17922-P), Common Q Platform Supplemental Information in Support of the APR1400 Design Certification, Rev. 2, May 2017.

[6] BTP 7-21, Guidance on Digital Computer Real-Time Performance, Rev. 5, March 2007.

[7] BTP 7-14, Guidance on Software Reviews for Digital Computer-based Instrumentation and Control Systems, Rev. 5, March 2007.

KEPCO & KHNP 104

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 9 DEFINITIONS RT Response Time Time interval from when the monitored parameter exceeds the trip setpoint value at the input to the sensor until electrical power is interrupted to the CEA drive mechanism through the actuation of the RTSS.

ESF Actuation Response Time Time interval from when the monitored parameter exceeds the trip setpoint value at the input to the sensor until the final actuator for the final plant component, such as the motor starter for a pump, valve, damper or fan, repositions to energize or de-energize that plant component.

KEPCO & KHNP 105

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 APPENDIX A CONFORMANCE TO BTP 7-21 A.1. LIMITING RESPONSE TIMES A.1.1 Acceptance Criteria Limiting response times should be shown to be consistent with safety requirements (e.g., suppress power oscillations, prevent fuel design limits from being exceeded, prevent a non-coolable core geometry).

Setpoint analyses and limiting response times should also be shown to be consistent. The reviewer should verify that limiting response times are acceptable to the organizations responsible for reactor systems, electrical systems, and plant systems before accepting the limiting response times as a basis for timing requirements.

A.1.2 Conformance TS A.2. DIGITAL COMPUTER TIMING REQUIREMENTS A.2.1 Acceptance Criteria Digital computer timing should be shown to be consistent with the limiting response times and characteristics of the computer hardware, software, and data communications systems. Computer system timing requirements that should be addressed in software requirements specifications are described in standard review plan (SRP) BTP 7-14(Reference 7).

A.2.2 Conformance TS KEPCO & KHNP A1

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS A.3. ARCHITECTURE A.3.1 Acceptance Criteria The level of detail in the architectural description should be sufficient that the Staff can determine the number of message delays and computational delays interposed between the sensor and the actuator.

An allocation of time delays to elements of the system and software architecture should be available. In initial design phases (e.g., at the point of design certification application), an estimated allocation of time delays to elements of the proposed architecture should be available. Subsequent detailed design and implementation should develop refined timing allocations down to unit levels in the software architecture.

A design should be feasible with currently known methods and representative equipment. Design timing feasibility may be demonstrated by allocating a timing budget to components of the system architecture so that the entire system meets its timing requirements. See NUREG/CR-6083, Sections 2.2, 2.3.1, and 2.3.2, and NUREG/CR-6082. The timing budget should include internal and external communication delays, with adequate margins.

Any non-deterministic delays should be noted and a basis provided that such delays are not part of any safety functions, nor can the delays impede any protective action.

Software architectural timing requirements should be addressed in a software architectural description as described in SRP BTP 7-14. Databases, disk drives, printers, or other equipment or architectural elements subject to halting or failure should not be able to impede protective system action.

A.3.2 Conformance TS KEPCO & KHNP A2

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 TS A.4. DESIGN COMMITMENTS A.4.1 Acceptance Criteria Design basis documents should describe system timing goals.

Timing requirements should be satisfied by design commitments.

A design should consider data rates, data bandwidths, and data precision requirements for normal and off-normal operation, including the impact of environmental extremes. There should be sufficient excess capacity margins to accommodate likely future increases in demands or software or hardware changes to equipment.

Design basis documents should identify design practices that the applicant/licensee will use to avoid timing problems. Risky design practices such as non-deterministic data communications, non-deterministic computation, use of interrupts, multitasking, dynamic scheduling, and event-driven design should be avoided. When such practices are allowed, the applicant/licensee should describe methods for control of the associated risk. NUREG/CR-6082 and NUREG/CR-6083 describe risky design practices in more detail.

A.4.2 Conformance TS KEPCO & KHNP A3

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 A.5. PERFORMANCE VERIFICATION A.5.1 Acceptance Criteria The means proposed, or used, for verifying a system's timing should be consistent with the design.

Testing and/or analytic justification should show that the system meets limiting response times for a reasonable, randomly selected subset of system loads, conditions, and design basis events. The subset should include some limiting load conditions and be chosen by persons independent of the persons who designed the system.

Both analytical and test techniques of timing analysis have drawbacks. It is difficult to demonstrate completeness of timing tests. Completeness is easier to demonstrate for analyses, but analyses predict extreme times that are not actually possible. Therefore, analysis and testing are often combined in a complementary manner to confirm that a system can meet the limiting response times.

Measurement methods should be appropriate to the resolution and detail required.

Timing measurements should meet projections or the anomalies should be satisfactorily explained (NUREG/CR-6083, Sections 2.1, 2.3.3, and 2.3.4).

A.5.2 Conformance TS A.6. USE OF CYCLIC REAL-TIME EXECUTIVE A.6.1 Acceptance Criteria In systems that include a cyclic real-time executive (operating system), a typical cycle includes application modules, diagnostic modules, and other support modules. A watch-dog timer is normally set at the beginning of each cycle and reset at the end. If the cycle is not completed before the watch-dog timer period is complete, an error is generated.

KEPCO & KHNP A4

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 A basis should be provided that describes the cycle and demonstrates that the watch-dog timer is correctly implemented, the time required for the application modules does not exceed the allotted time given in the architecture timing budget, and diagnostic and other support modules will not cause the allotted time to be exceeded.

Examples of solutions acceptable to the Staff may be found in the Safety Evaluation Reports for the Palo Verde Nuclear Generating Station, Units 1, 2, and 3, "Issuance of Amendments on the Core Protection Calculator System Upgrade," dated October 24, 2003, and the Siemens Power Corporation, Topical Report EMF-2110(NP), "Teleperm XS: A Digital Reactor Protection System," dated May 5, 2000.

A.6.2 Conformance TS A.7. USE OF PART-SCALE PROTOTYPES A.7.1 Acceptance Criteria In systems that have not been implemented and tested on a full scale, expected system delays on scale-up should be calculated and shown to be less than limiting system response times (NUREG/CR-6083, Sections 2.1.3 and 2.1.4).

A basis should be provided that describes the effects of adding sensors, divisions, communication links, controllers, computer nodes, or actuation devices required to scale the test system to full scale.

Test data should confirm scaling as well as performance projections. Exceptions are considered anomalies or abnormal events.

Prototypes designed to demonstrate scaling should include all significant architectural elements plus enough additional elements to show the scaling effects to be measured.

KEPCO & KHNP A5

Non-Proprietary Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 A.7.2 Conformance TS KEPCO & KHNP A6

ML18087A110

Text

Response

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